Blue is always trying to show he is the best trainer around. He usually expresses his big headed attatitude when talking to Red. He usually talks down to Red, boasting about his own adventures in Kanto.
In File 4 - Charizard, Blue mentioned that he had caught 148 Pokémon of different species.
Unlike in the game, Blue helps Red a few times like in the Pokémon Tower in Lavender town and Silph Co. in Saffron City. He and Red don't battle much, unlike the games. They only fight on Route One and the Pokémon League.